
           
        var scrollSpeed = 70;       // Speed in milliseconds
	    var step = 1;               // How many pixels to move per step
	    var current = 0;            // The current pixel row
	    var imageHeight = 4300;     // Background image height
	    var headerHeight = 100;     // How tall the header is.
	   
	    //The pixel row where to start a new loop
	    var restartPosition = -(imageHeight - headerHeight);
	   
	    function scrollBg(){
	       
	        //Go to next pixel row.
	        current -= step;
	       
	        //If at the end of the image, then go to the top.
	        if (current == restartPosition){
	            current = 0;
	        }
	       
	        //Set the CSS of the header.
	        jQuery('#header').css("background-position","0 "+current+"px");
	       
	       
	    }
	   
	    var init = setInterval("scrollBg()", scrollSpeed);
